package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate<Object, Object> redisTemplate;

    /**
     * 新增菜品
     *
     * @param dishDto 菜品信息及菜品口味合起来的数据传输对象
     * @return 添加结果
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        //Set<Object> keys = redisTemplate.keys("dish_*");
        //redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     *
     * @param page     页数
     * @param pageSize 每页条目数
     * @param name     搜索菜品信息，如果没有则为查询全部数据
     * @return MP提供的Page对象，包含查询到的所有数据和总条目数
     */
    @GetMapping("/page")
    public R<Page<DishDto>> page(int page, int pageSize, String name) {

        //构造分页构造器
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //构建条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();

        //添加过滤条件
        queryWrapper.like(StringUtils.isNotEmpty(name), Dish::getName, name);

        //添加排序条件，根据最后修改时间
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo, queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");

        List<Dish> records = pageInfo.getRecords();

        //遍历dish表，拷贝表内容到dishDto，并给dishDto赋上categoryName
        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId();//菜品分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            String categoryName = category.getName();
            dishDto.setCategoryName(categoryName);

            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     *
     * @param id 菜品id
     * @return 菜品信息
     */
    @GetMapping("/{id}")
    public R<DishDto> getById(@PathVariable Long id) {

        DishDto byIdWithFlavor = dishService.getByIdWithFlavor(id);

        return R.success(byIdWithFlavor);
    }

    /**
     * 修改菜品
     *
     * @param dishDto 修改后的菜品信息和对应的口味信息
     * @return 修改结果
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        //Set<Object> keys = redisTemplate.keys("dish_*");
        //redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("修改菜品成功");
    }

    /**
     * 删除/批量删除
     *
     * @param ids 需要删除的菜品id
     * @return 删除结果
     */
    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids) {
        System.out.println(ids);
        dishService.removeWithFlavor(ids);

        //清理所有菜品的缓存数据
        Set<Object> keys = redisTemplate.keys("dish_*");
        redisTemplate.delete(keys);

        return R.success("删除菜品成功");
    }

    /**
     * 批量修改状态信息
     *
     * @param status 修改后的状态
     * @param ids    需要修改的菜品id
     * @return 修改结果
     */
    @PostMapping("/status/{status}")
    public R<String> status(@PathVariable Integer status, @RequestParam List<Long> ids) {
        //添加修改条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //设置需要修改的菜品id
        queryWrapper.in(Dish::getId, ids);
        //添加修改条件
        Dish dish = new Dish();
        dish.setStatus(status);
        //修改状态
        dishService.update(dish, queryWrapper);

        //清理所有菜品的缓存数据
        Set<Object> keys = redisTemplate.keys("dish_*");
        redisTemplate.delete(keys);

        return R.success("状态修改成功");
    }

    /**
     * 根据条件查询对应的菜品数据
     *
     * @param dish
     * @return
     */
    /*@GetMapping("/list")
    public R<List<Dish>> list(Dish dish) {

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus, 1);
        queryWrapper.like(dish.getName() != null, Dish::getName, dish.getName());
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        return R.success(list);
    }*/
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
        List<DishDto> dishDtoList = null;

        //动态构造key
        String key = "dish_" + dish.getCategoryId() + "_" + (dish.getStatus()!=null?dish.getStatus():"1");//dish_1397844391040167938_1

        //先从Redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        if (dishDtoList != null) {
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus, 1);
        queryWrapper.like(dish.getName() != null, Dish::getName, dish.getName());

        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId();//菜品分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            String categoryName = category.getName();
            dishDto.setCategoryName(categoryName);

            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<DishFlavor>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
            //SQL:select * from dish_flavor where dish_id = ?
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            if (dishFlavorList != null) {
                dishDto.setFlavors(dishFlavorList);
            }
            return dishDto;
        }).collect(Collectors.toList());

        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key, dishDtoList, 60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }
}
